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Old 05-03-2006, 12:42   #1 (permalink)
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what speed should OD engage?

I have an 05 Explorer 4.0L 2WD which at about 48 mph the OD kicks in and RPMs drop to about 1500. When this happens a moaning sound can be heard from the front of the vehicle, espcially if I acclerate. Sometimes a faint rattling noise can be heard also. Sometimes it will stay in OD and not downshift with moderate acceleration Is this normal?
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Old 05-04-2006, 15:31   #2 (permalink)
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Re: what speed should OD engage?

The groaning or rattle might be something bad. "Kick down" (to a lower gear) happens as the PCM sees fit. If you're only moderately accellerating it might not kickdown.
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Old 05-04-2006, 16:06   #3 (permalink)
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Re: what speed should OD engage?

It is heard when moderately accelerating while in OD without a kickdown. Once it downshifts it goes away.
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Old 05-04-2006, 19:17   #4 (permalink)
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Re: what speed should OD engage?

if it's an 05 it should be under warranty You might want to have it looked at.
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